PICS: Kendall Jenner shows off her jet-boarding skills in St Barts

The 19-year-old beauty is holidaying with her family on the Caribbean Island of St Barts and she was spotted wearing a helmet and life jacket whilst jumping and balancing above the water on a Back to the Future style water-craft.

The jet-board uses a stream of propulsion to drive the rider through air and water and Jenner appeared to have mastered the art as she sped off from her friends and family.

The Chanel model was joined by her 18-year-old sister Kylie Jenner and the teen's boyfriend Tyga, 25, however pregnant Kim Kardashian West stayed cooped up inside the yacht.

The 34-year-old Keeping Up With the Kardashians star documented the day on social media site Instagram but complained of being "bored" whilst her younger sisters had all the fun.

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